Intensifier for telegraph-sounders.



R. W. GRAWFGRD, In., R. H. BECK & L. W. DAVIES. INTENSIHBB rol; TBLEGBAPHsoUNDEBs.

APPLIOATIOI PILBD lov 8 1 sos.

Patllted July 20. 1909.

I SHEETS-SHEET 1.

al umm B. W. CRAWFORD, Jn., R. H. BEURi EL. W. DAVIES. w'mrsmnn ron mmsmn'sopnnnns.

LPPLIUATIOH P'ILBD NDV. 8, 1908. 928,589. Pantea July 2o. 1909.

UNITED STATE PATENT OFFICE.

INTENSIFI FOR TELEGRAPH-SOUNIJERS.

Spcification of Letters Patent.

Patented July 20, 1909.

Application tiled November 3. 1908. Serial No. 460.973.

fclamping nuts 2t).

Telegraphic Sounders, ol' which the following l is a specification.

This invention relates to telegraphy and has special rclerence to an improvement on relays.

An object of this invention is to provide a relay with means whereby the Isound iroduccd b v the instrument will be intensilied so that the same can bc more distinctlyf heard.

Another object of the invention is the provision otan intensifier' to a rela)Y whereby local circuits ma)r be dispensed with and the shaped frame t8 is positioned transversely of the base lt) and secured at its opposite lower extremities b v bolts itl which are passed therethroiurh and secured to the base l0 by 'l`hc lower end ol" the frame IS is reduced and engaged upon the upper face of the base l() and curves upwardly and out a ardly to the upper portion thereof where it is circulaily formed to cn-l gage a sound box '2l for a purpose hereinaiter described. A metallic s: rip 2'. is positioned across the upper face of the base lu and is provided with iiunges 23 at its opposite. extremities between `.rhich is pivotallv engaged an armature 24 which is mounted at Athe extremities of the cores 25 which energize the armature .Zlupon the cnergization ol' the magnets l l..

-'l`lu` sound liox t is provided across its` lower side with a plate .ti which is provided relay or sounder substituted in the main cirt cuit will be suiiicientlv loud to be heard by the operator without the assistance of the loealrcireuit and additional instruments.

The invention further designs a device ot' this character which is of simple and economical structure and one which can be a i- `plied to an instrument without material y altering the same.

Other objects and advantages will be apparent from the following description and it will be understood that changes in thc speeiiicl structure shown and described ma be made within the scope oi' the. claims wit tout.

' de larting from the spirit of the invention.

11 the drawings forming a )oi-tion of this specification, and in which li o numerals of reference indicate similar parts in the several 'views, Figure l is a side elevation ot the complete device, lt'g. 2 is a longitudinal vertical section ot the same, Fig. 3 1s a side elc.-

vation of a nuulitication ofthe device, Fig. 4 is a front elevation ol' the n "Jdiied form of brr'ieket for the. sounding ai `uwlnnent.

Referring to the drawings, l() designates a base which supports upon its upper surface magnets il 'which are secured thereto b v a holt l2 which is provided u'itli an enlarged beveled head 13 'l'or engagement between the 5" magnets 11 and clamps the magnets in rigid position upon studs 14 by means ol' a nuti5. The base carries theI usual binding posts `1,6 which are connected to the magnets at their lower extremities beneath the base 10 and which are adapted to engage with the line wires 17 to energize the magnets T1.

with laterally extended and oppositcly disposed ears 27 und which curriesat itsopposite cxtrennty two depending lugs .23 which cxtcnd into apertures formed m the opposite;

extremities of ,second plat-e 9 which is pro vided with ears 3U. Set screws 3l are positie/ned throufll the ears .27 and 3() for the purpose. of ietaclmbly and adjustably securing the plate 29 to the sound box 18.

The plate 39 is provided with a depending abutment 3;? which 'is engaged by the armature 24. The plate 29 is a so provided with a rearwardly extending bracket 33 which curved dowmvardlir at its rearI extremit)` where it supports a set screw 34 for engage nient against the armature .4 to limit and regulate the reciprocation thereof The sound box 2t is n'ovided with fianges 35 and 36 between which is engaged a disk 3T which is centrally positioned bv gaskets 3S positioned upon the opposite side of the disk 37 againstl the flanges 35 and 36. The sound box is also provided with a re luced'portion 3*.) upon which is secured a ho 1n 40 for conveying and increasing the resonance of the instrument. The hase l() carries a post 41 which adjustably carries an arm 42 ich is provided at its outer extremity with a set screw 43 mounted upon a spindle 44 which carries about its inner extremity a cord 45 attached to a spring 46 carried bv the armature 24. The. spring 46 is used for the purpose of returning and of holding, the armature 24 normally a ainst the setserew 34.

In operation, w en the magnets 11 Vare energized the ari-nature 24 is-drawn toward the eores `25 und caused to strike against the l abutment 32. The vibration set up in the abutment 32 is transmitted to the plate .29 and through a st lus zn'rn 54; to the disk 37 Where it is' repro( `uned end intensified es the sound Waves are transmitted through the horn 40. Vhen the orrluit in the line 17 is broken and the magnets l1 ere denmgnetized l the cores 25 releiise the armature 24 and i ellowi7V the spring k1'16 to withdrew the ermel ture und cause the seme to strike against the .set sereni 34 'Which causes vibration throu `h the supportfhnd plete 29 where the vi retiens are communicated to thediaphragrn 37 through the stylus-nrmA and from thence intensified us they radiate throu h the horn 40.`y f

In t e referred form shown in the modification disclosed in Figs. 3 and 4 the base 47 supportsfthe inegnetsflS by u bolt 4S) which l is provided with an enlarged beveled head 5() for engagement between the magnets to hold the sarne secu'rel "in osition. The beveled head 5p Vis provi( ed wth two arms 51 end 5:2

f which extend upwardly and diver e to support upon their upper ends e sound" #ox 53 ot a eornrnon `Colxstrilction es hereinhefore described. l The divergederms 5l and 52 form l athriacketQfor tliesounding device which is i simplery n` construction and which produ ees "1. A device of the class described comi pl nto,

L ture.

, i l t l en instrument of neat appearance. X l

)rising :L relay, a bracket disposed on seid ren ey, e sound box carried by seid bracket, n z

plete carried by sind sound box, oars on sind d second platte, ours ou seid second plete, sot screws pdsitioned through seid cnrs 'or securing said plates ndjustehly together, e stylus erm disposed on seid first plete enpaged with the diaphragm in sind sound rox, e bracket carried by sind second pleito, u. set screw disposed through seid bracket for engagement with the armature of said relay end-en ebutment depended from seid sec-ond plete for engagement with seid erme- .Z. A device of the character described comprising e bese, a` relay mounted on seid base, e heeded holt carried by seid base exi I tended upwardly between the nmgnets thcreon to secure the same in position, abreeket upwsrdly extended from said bolt, e sound box disposed on said bracket and en abut nient carried by seid sound box for ongegement with the armature of seid relay for the "Apurpose of regulating theA motion of the seine.

ln testimony whereof we nllix our signa-v tures, 1n presence of two witnessesY RALPH W` CRAWFORD, Jn. RALPH lll. BECK, LEVY 1S Wv DAVlES.

Witnesses:

E. E. PIKE, S. E. BUTLER. 

